SPB315 slug_MEssential3 and a tri-fold push button

and a tri-fold push button release clasp

Lightweight as well as durable

In stainless steel with black hard coating

dark gradated blue of the dial suggesting the variations in sunlight as it penetrates deep into the ocean

The blue dial features day/date calendar

SPB315 slug_MEssential3 and a tri-fold push buttonProspex Automatic Diver's Watch. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with re creations and re interpretations of landmark achievements. With the thinnest case to date of any Seiko automatic diver's watch,